Year	% of revenue
2012	0.20326277101319964
2014	0.5129891283964034
2015	0.5586149297492337
2016	0.8101465684308115
2017	0.42826922654277444
2018	0.5775671452134715
2019	0.2767754714297
2020	0.17425426901433097
2021	0.29874260892778914